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UNITED STATES PATENT OE icE.

GEORGE E. OULLINGWORTH, OF NEXV YORK, N. Y.

CROSS-HEAD.

SPECIFICATION forming part of Letters Patent No. 343,300, dated June 8,1886.

Application filed October 28, 1885. Serial No. 181,122. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE R. OULLING- WORTH, of the city and county of New York, in the State of N ew York,have invented a new and useful Improvement in Cross-Head and Piston-Rod Connections for Engines,of which the following is a specification.

My invention relates more particularly to aircompressors and pumping engines in which the power-cylinder and the pump-cylinder are arranged in line, with their pistons upon a common piston-rod; but the invention is generally applicable to engines in which are employed outside connecting-rods attached to the outer ends of the crosshead,and serving to transmit power therefrom to the crank-shaft. In such engines it is desirable that the pistonrod should be so connected with the cross-head as to be self-adj usting relatively thereto,so that any inequality in the length of the two connecting-rods,whicl1 may exist when new,or by reason of unequal wear in theirboxes,will not cause the cross-head to bind in its guidcs,nor the pistons to bind in their cylinders.

The invention consists in a novel construction of a clamping device, whereby the pistonrod is connected with the cross-head, and in the combination of such clamping device with the cross-head, as hereinafter more fully described,and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side view of the cross-head and a transverse section of the piston-rod, showing the rod connected with the cross-head by my improved device. Fig. 2 is a plan of the cross-head and portions of the rod and clamp, the members of the clamping device being shown partly in section to more clearly illustrate their construction; and Fig. 3 is a transverse section on the plane of the dotted line :0 :0, Fig. 2.

Similar letters of reference designate corresponding parts in the several figures.

A designates the cross-head, which consists of a bar of metal approximately fiatfrom end to end, and provided at the ends with wrists a, for the attachment of the connecting-rods. The cross-head also has on opposite ends of the wrists a collars or shoulders a ed, the latter of which may be formed by a cap secured to the end of the wrist by a bolt, a Near opposite ends of the cross-head are fitted slides B, which are fitted to reciprocate in the crosshead guides of the engine.

The cross-head here represented is intended for an engine in which two cylinders are in line, and the two sections of the piston-rod C G are connected with opposite ends of the clamp D, which embrace the cross-head, and through which the piston-rod transmits power to the cross-head. This clamp D is divided in a horizontal plane, and its two halves or sections are secured together by clampingbolts 1). The sections 0 of the piston-rod are received in sockets c, at opposite ends of the clamp, and may be screwed therein, as here represented, or fastened by a key or otherwise. The clamp D and the cross-head A are pivoted together by a bolt, E, which extends transversely through them and forms a center on which the clamp and cross-head may swing relatively to each other. The making of the clamp D in two halves or sections enables it to be readily applied to the cross-head A, which could not be readily doncif it were made in a single piece, because of the collars or shoulders c,which are integral with the crosshead.

As beforestated, the cross-head consists,essentially, of a fiat bar having a considerable width and it has at opposite sides convex projections A, the faces of which are concentric with the center pivot, E. The opening in the clamp D is at one end, (I, curved or made concave to fit the convex projection A on that side of the cross-head, and at the other end of the clamp are wedge-blocks e, the faces of which are concaved to fit the convex projection A on the cross-head, and the backs of which are flat to fit the end wall of the opening in the clamp. These wedge-block's 0 may be inserted from opposite sides of the clamp D,and may be tightened by means of a bolt, f, which passes through them and serves to draw them inward toward each other.

From the-above description it will be readily understood that the clamp D and the crosshead A are self-adjusting relatively to each other, as they are made to swing upon a center pivot, E, and hence no binding or cramping of the parts from excessive friction will be produced, even if the cross-head does not stand exactly at right angles to theline of piston-rod.

The cross-head may be readily finished in a shaping-machine,and the concave bearing-surfaces of the clamp and wedge-block 6 may be finished truly in a lathe to fit the curvature of the convex projections A of the cross-head.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-- 1. The combination, with the cross-head and piston-rod,of a clamp embracing the crosshead, and with which the piston-rod is connected, and a central pivot -bolt passing through the clamp and cross-head, whereby provision is afi'orded for the self-adj ustment of the clamp and cross-head relatively to each other, substantially as herein described.

2. The combination, with a cross-head having at opposite sides convex projections, of a clamp embracing the cross-head, and with which the piston-rod is connected, the clamp atone end of its opening being concave to fit the convex projection on one side of the cross head, and wedge-blocks having concave faces inserted in the clamp between the opposite end of its opening and the cross-head, substantially as herein described.

3. The combination, with the cross-head A, having at opposite sides convex projections A, of a two-part or divided clamp, D, and the bolts 1), for securing its sections together, one end wall of the clamp being concave to fit the convex projection at one side of the crosshead,the wedge-blocks e,having concave faces, inserted from opposite sides of the clamp, between the opposite end of its opening and the cross-head, and the bolts f, whereby the wedgeblocks maybe adjusted, substantially as herein described.

G. R. OULLINGVORTH.

\Vi tn esses:

FREDK. HAYNES, HENRY MCBRIDE. 

